ASTM D618 PDF

  • July 2, 2019

ASTM D Practice for Conditioning Plastics for Testing. ASTM D EMSL book · Materials Testing Lab Services Guide · Products. Sample Reports. ASTM D – 13 Practice for Conditioning Plastics for Testing – Download as PDF File .pdf), Text File .txt) or read online. ASTM standard – Practice for. ASTM D Standard Practice for Conditioning Plastics for Testing.

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This standard has been approved for use by agencies of the Department of Defense.

ASTM D – CONDITIONING PLASTICS

ASTM International takes no position respecting the validity of any patent rights asserted in connection with any item mentioned in this standard. NOTE 12—It has been found that, for certain tests and materials, more reliable data are obtained in enclosures with circulating air rather than still air. A superscript epsilon e indicates an editorial change since the last revision or reapproval. When use of acid or salt solutions has a deleterious effect on materials being tested, use glycerin solutions in accordance with Practice D to control relative humidity.

It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use. Users of this standard are expressly advised that determination of the validity of any such patent rights, and the risk of infringement of such rights, are entirely their own responsibility.

It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use.

Start the test as soon as possible, but do not allow more than 1? November 1, 1 Added Note Refer to the material speci? Work Item s – proposed revisions of this standard. Start the tests immediately and complete them as soon as possible.

NOTE 10—Constant relative humidity can be obtained only by careful temperature control. Selection of Conditioning Procedure Hold the specimens at the test temperature for no more than 5 h prior to test, and in no case for less than the time required to ensure thermal equilibrium. Individual reprints single or multiple copies of this standard may be obtained by contacting ASTM at the above address or at phonefaxor service astm.

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Refer to the material specification before using this practice. Tests at Other Standard Test Temperatures Temperature and relative humidity tolerances shall be in accordance with Section 3, unless otherwise speci? Additional measurements shall be made throughout the area to show compliance to the temperature and relative humidity required.

ISO describes only two temperature and humidity conditions for conditioning or testing, or both. Procedures for maintaining close tolerances are described in Practice E In order that reliable comparisons may be made of different materials and between different laboratories, sstm is necessary to standardize the humidity conditions, as well as the temperature, to which specimens of these materials are subjected prior to and during testing.

In these cases, or for materials that are not adversely affected by longer conditioning times, it is permissible to use conditioning times longer than 5 h.

The material specification takes precedence over this practice. Depending on the thickness, type of material and its previous history, it is possible that it would take 20 to days or more to ensure substantial axtm under normal conditions of humidity and temperature.

Historical Version s – view previous versions of standard. NOTE 11—A considerable number of other procedures that might be considered as functional are outlined in Practice D Last previous edition approved in as D – Specimens ast, only be removed from the water as the tests are ready to be conducted. Shorter conditioning times may be used for thin specimens provided equilibrium is substantially obtained.

Consequently, conditioning for reproducibility must of necessity be used for general purchase speci? NOTE 6—Procedure B is commonly used for the purpose of obtaining reproducible test results on the thermosetting materials by means of a short-time conditioning period, or where the speci? Referenced Documents purchase separately The documents listed below are referenced within the subject standard but are not provided as part of the standard. This standard is subject to revision at any time by the responsible technical committee and must be reviewed every?

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Consequently, conditioning for reproducibility must of necessity be used for general purchase specifications and product control tests. Asym enclosures, desiccants, or desiccating techniques may be used that produce and maintain an atmosphere equivalent to that over anhydrous calcium chloride.

To ensure substantial equilibrium under asttm conditions e618 humidity and temperature, however, may require from 20 to days or more depending upon thickness and type of material and its previous history. Designations for Conditioning 7. In order to make reliable comparisons between different materials and between different laboratories, it is necessary to standardize the humidity conditions, as well as the temperature, to which specimens of these materials are subjected prior to and during testing.

Awtm 8—It has been found that, for certain tests and materials, more reliable data are obtained in enclosures with circulating air rather than still air. Provide adequate air circulation on all sides of the test specimens by placing them in astn racks, hanging them from metal clips or laying them on wide-mesh, wire screen frames with at least 25 mm [1 in.

Current edition approved November 1, Treat test specimens over 7 mm in thickness as above, except that the minimum time shall be 88 h. Your comments are invited either for revision of this standard or for additional standards and should be addressed to ASTM International Headquarters.

ASTM D618 – Standard Practice for Conditioning Plastics for Testing

Precision and Bias Wstm 1 — This standard and ISO address the same subject matter, but differ in technical content. Originally approved in Tests at Normal Temperatures 9.

The tolerances for this procedure shall be as follows: D Specification for Laminated Thermosetting Materials. In such cases enclosures with circulating air should be used. Link to Active This link will always route to the current Active version of the standard.